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Uzair3D

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    Beginner to JavaScript, having trouble with variable :(

    in JavaScript

    Posted · Edited by Uzair3D

    Please look at the code:

    in this line: line#42reactionTime = (clickedTime - startTime)/1000;

    all browsers are saying that startTime is not defined :/

    any help will be appreciated :good:

    <!doctype html><html><head>    <title>Learning JavaScript</title>    <meta charset="utf-8" />    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />    <meta name="viewport" content="width=device-width, initial-scale=1" />                  <style type = "text/css">        #simpleBox{        width:200px;        height:200px;        background-color:red;        display:none;    }            </style></head><body>    <div id = "simpleBox"></div>    <script type = "text/javascript">                function makeBox() {         var clickedTime;         var startTime;         var reactionTime;            var x = Math.random();                x = x*5000;                                setTimeout(function (){                    document.getElementById("simpleBox").style.display = "block";                    startTime = Date.now();                }, x);        }        document.getElementById("simpleBox").onclick = function (){            clickedTime = Date.now();            reactionTime = (clickedTime - startTime)/1000;            alert(reactionTime);            this.style.display = "none";            makeBox();        }        makeBox();            </script></body></html>
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